Festo is the German company focused on creating electromechanical machines that mimic the biological world in greatest detail possible. They worked on pneumatic muscles, brain controlled structures and even flying robots.
The Bionicopter is a truly flying robot that has wings which are used exactly like a bird uses their wings to fly around. You would expect the device to use rotors or a small jet engine, but the wings flap in a very natural way. Now, this is copying nature in the mecatronical world.
Bionicopter can fly in all directions, hover in mid-air and glide without beating its wings. The day of the Transformers is near.